Ship project history: Project of 1915,built by two series differing among themselves in the
sizes. Intended for operations on inner harbours of naval bases and
closed harbour areas,also fulfilled police functions.

Modernizations: 1916, F5, 6, 11 and m. b.
others: +.1 x 1 - 450 TT

Naval service: Mostly transferred to police
in 1920 but some boats were reverted to navy in 1939 - 1940.